Inductor magneto



Mar. 13, 1923. V w. w. HAWKINS.

INDUCTOR MAGNETO.

FILED AUG. 19, 1921.

2 SHEETS-SHEET 2.

Patented Mar. 13, 1923.

UNITED STATES WILLIAM WALTER HAWKINS, OF BROOKLYN,

1,448,346 PATENT OFFICE.

NEW YORK, ASSIGNOR TO WEBSTER ELECTRIC COMPANY, OI RACINE, WISCONSIN, A CORPORATION OF WISCONSIN.

' INDUCTOR MAGNETO.

Application filed August 19, 1921.

To all whom it may concern:

Be it known that I, WILLIAM W. HAWKINS, a citizen of the United States, and resident of Brooklyn, in the county of Kings and" crating coil of the device is stationary and is mounted upon a stationary core through which flux is directed first in one direction and then in the other, due to the co-operation of the rotor inductors with the coil core and the poles of the permanent magnet field structure of the-device. Specifically my invention is concerned with the construction, conformation, relative disposition and manner of co-operation of the rotor, the coil carrying core and the field structure pole pieces of an ignition magneto of the inductor type.

'My present invention is applicable to high and low tension magnetos and may-also be incorporated in either oscillators or magnetos of the continuously rotating type.

In the accompanying drawings illustrating my invention,

Figure 1 is a vertical sectional view of a magneto embodying my invention, this view being taken on line 1-1 of Figure 2 and looklng in the direction indicated b the arrows Figure 2 is an end view taken on the line 2-2 of Figure 1 and looking in the direction indicated by the arrows,

Figure 3 is a perspective which illustrates quite clearly those portions of the magnet with which my present invention is particularly concerned, and

Figure 4 is an isolated view in perspective of the rotor.

Similar characters ofreference refer to similar parts throughout the several views.

The magneto comprises non-magnetic end plates 5-5, a non-magneticbase plate 6, and a permanently magnetic field structure comprising the magnets 77 and the pole pieces 8 and 9. Each of the pole pieces preferably Serial No. 493,646.

consists of a plurality of laminae secured in position by rivets 10.

Located above the pole pieces and disposed between the legs of the magnet is a stationary coil carrying structure indicated as a whole by reference numeral 11. The coil carrying structure comprises a core 12, which consists of a plurality of horizontally disposed laminae secured together by rivets 12*. The core 12 is held rigidly in position by any suitable means, as, for instance, the brackets 13 and the screws 14. The ends of core 12 are preferably provided with downwardly converging lateral surfaces 1515, and the intermediate portion of the core is preferably of circular cross section. The magneto generating coil is carried on the intermediate portion of the core, and in case my invention is applied to a high tension magneto, a. secondary winding is placed around and in inductive relation to the primary or generating winding. In the drawing, I have illustrated the core as being pro vided with both primary and secondary windings.

Projecting downwardly from each of the core ends, are two downwardly divergent arms which constitute low reluctance paths for flux between the core 12 and the rotor inductors presently to be described. The core arms are indicated at A, B, C and D. Each of these arms consists of a group of laminae, and is provided at its lower end with an arcuate face concentric with the arcuate faces of pole pieces 8 and 9. The core arms are provided at their upper ends with inclined surfaces which co-operate with the surfaces 1515 of the core. The laminae of each. core arm are secured by rivets 16 -16,

and screws 17-17 to diverging flanges formed on bracket 13. It will be noted that the core arms appear to be substantially L shaped when viewed from the side, and that the lower portions of the arms at one end of reference numeral 19 Fixed upon the shaft 18 is a non-magnetic sleeve 20', which is pro vided with cylindrical ends separated by annular flange 20. The cylindrical end portions of the sleeve are substantially co-eirtensive with the arcuate surfaces of the core structure arms. Rigidly fixed upon each of the cylindrical ends of the sleeve 20 is a twowing inductor, which comprises a plurality of laminae secured together by rivets 21. The inductors, illustrated at E and l are provided with convex extremities adapted to co-operate with the concave faces of the pole pieces and the core structure-arms. It will be noted that the inductors are disposed at right angles to each other.

lln discussing the operation of the device, ll shall refer to Figure 3. With the rotor in the position shown in this figure, the magnetic circuit may be traced from pole piece 8 to inductor E, and thence through core structure arm A, core 12, core structure arm C and inductor F to pole piece 9, and thence around the magnets to pole piece 8. Nhen the rotor is moved through an angle of slightly more than degrees, in a counterclockwise direction from the position shown in Figure 3, the flux is directed reversely through the coil, the magnetic circuit then being traced from pole piece 8 through inductor F, core structure arm D, core 12, core structure arm B, and inductor E, to pole. piece 9, and thence around the magnets to pole piece 8.

llt will be understood that continuous rotation of the rotor will cause four reversals of the direction of flux in core 12 per revolution. If the magneto of my invention is used as an oscillator, the position illustrated in Figure 3 may be the cooked position of the rotor and a position substantially 45 degrees from the position shown may be the recoil position of the rotor.

Having thus described the magneto of my invention, what ll claim is new and desire to secure by Letters Patent is:

1. A magneto comprising a permanent magnet, pole pieces therefor, a stationary core structure, a coil in inductive relation thereto, said core structure comprising two separated flux conducting arms at each end thereof, and a rotor comprising two inductor elements, one inductor element adapted to co-operate with both pole pieces and with the arms at one end of the core structure, the other inductor adapted to cooperate with both pole pieces and the arms at the other end of the core structure.

2. A magneto comprising a permanent magnet, pole pieces therefor, a stationary core structure, a winding in inductive relation thereto, a rotor comprising a pair of two-wing inductors disposed substantially right angles to each other, and thin carrying means at the-ends of the core structure,

each inductor adapted to co-operate with both pole pieces and with the flux carrying means at one end of the core structure, the pole pieces, inductors and core structure flux carrying means being so conformed that when each. wing of each inductor is passing from pole piece to pole piece the other wing of said inductor will not pass out of inductive relation to its associated core structure flux carrying means.

3. A magneto including a rotor comprising a pair oftwo-wing inductors disposed substantially at right angles to each other, a permanently magnetic field structure comprising a pair of pole pieces disposed substantially 45 degrees apart with respect to the rotor axis, a core structure, and flux carrying means at opposite ends of the core structure, the flux carrying means at each end of the core structure lying opposite the pole pieces, each inductor adapted to cooperate with both pole pieces and with the flux carrying means at one end of the core structure, the flux carrying means at each end of the core structure being so conformed that the associated inductor will not pass out of inducting relation thereto when passing from pole piece to pole piece.

d. A magneto comprisin in combination, a horse-shoe magnet field structure comprising pole pieces, a stationa core disposed above the pole pieces an located in the space between thefield structure legs, a winding in inductive relation to the core structure, a rotor operating around an axis located above the pole pieces'and below the core structure, said core structure comprising flux carrying means depending from its ends, said rotor comprising a pair of twowing inductors disposed substantially at right angles to each other, each inductor adapted to co-operate with both pole pieces and with the flux carryin means at one end of the core structure, the inductors, pole pieces and core structure flux carrying. means being so conformed and related that neither inductor in passing from pole piece to pole piece passes out of inductive relation to the core structure.

5. A magneto comprising a field structure havin pole pieces, a core structure, a coil in inductive relation thereto, flux carrying means at each end of and forming part of the core structure, and a rotor comprising a pair of two wing inductors displaced 180 from each other, each of which is adapted to co-operate with both pole pieces and with the flux carrying means at one end of the core structure, the

pole pieces, inductors and flux carr-yiingx means aforesaid being so conformed and related that each inductor in passing from pole piece to pole piece does not pass out. of inductive the core structure.

magneto comprising a field magnet having pole pieces, a stationary core structure, a pair of separated arms at each end of the core structure which extend toward the pole pieces, and a rotor comprising a pair of inductors each of which is adapted to co-operate with both pole pieces and the arms at one end of the core structure.

7. An inductor magneto comprising a field magnet having pole pieces, a stationary core structure, a. pair of separated arms at each end of the core structure which extend toward the pole pieces, and a rotor comprising a pair of inductors each of which is adapted to co-operate with both pole pieces and the arms at one end of the core structure, the pole pieces, inductors and core structure arms being so conformed and related that each inductor in passing from pole piece to pole piece passes from one to the other of its associated core structure arms.

8. A magneto comprising a rotor provided wit-h a pair of two-wing inductors disposed at right angles to each other, a field structure comprising pole pieces having polar faces concentric with the axis of rotor movement and disposed substantially degrees apart, a core structure, a coil in inductive relation thereto, and arms extending from the core structure ends toward the pole pieces, said arms being provided with arcuate faces which lie opposite the polar faces, each inductor adapted to cooperate with both pole pieces and with both of the arms at one end of the core structure.

9. A magneto comprising a field magnet and a rotor provided at each of its ends wit-h a two wing inductor, said inductors being disposed at right angles to each other; a pair of pole ieces for said magnet, said pole pieces being disposed beneath and on opposite sides of the rotor axis, a core structure disposed above the rotor and parallel with the rotor axis, a generating winding carried by the core structure, said core structure being provided at each of .its ends with a pair of separated downwardly diverging arms, the inductor at one end of the rotor adapted to co-operate with one pair of said arms, and with both pole pieces of the field magnet, the other inductor being adapted similarly to co-operate with the other pair of arms and with both pole pieces.

10. A magneto comprising end plates and a horse-shoe field. magnet structure between said end plates, a rotor rotatably mounted in said end plates for movement between the legs of the horse-shoe magnet field structure, a pair of two wing inductors carried by said rotor, said inductors being disposed at right angles to each other and being located at opposite ends of the rotor, a pair of pole pieces for the field structure, said pole pieces being located beneath and on opposite sides of the rotor axis, a core structure supported b and between said end plates and dispose above the rotor and parallel with the rotor axis, a pair of down wardlydiverging arms in contact with each end of the core structure, and a generating winding carried by said core structure, the inductor at one end of the rotor adapted to co-operate with one pair of said arms and with both pole pieces, and the other inductor adapted similarly to co-operate with the other pair of arms and with both pole pieces.

In witness whereof, I hereunto subscribe my name this 16th da of Jul 1921.

WILLIAM WA TER AWKINS. Witnesses:

JOHN J. KELLY, LLOYD M. VOSSNACK. 

